Federal police have released the images of seven men they say may be able to assist an investigation related to ceasefire rallies in Melbourne last weekend.

The AFP alleges the individuals were displaying "suspected prohibited symbols" including the Hezbollah flag.

The images were taken on Sunday between 12:30pm and 2:00pm.

The display of the flags, waved at a rally calling for ceasefires in Gaza and Lebanon in Melbourne's CBD, was condemned by political and religious leaders.

The Jewish Community Council of Victoria's Naomi Levin described the display as "highly disturbing", while Adel Salman from the Islamic Council of Victoria said the people flying the flags were "an absolute minority" of protest attendees.

The AFP has been looking into the incident under an investigation dubbed Operation Ardvarna.

It says some of the people photographed have been named publicly under what could be false names.

Anyone with information is encouraged to call Crime Stoppers.